
Jamestown, North Carolina
David Billings
Technical Instructor, Cisco Academy Instructor,
Information Technology Department Chair
AAS, BSC, MBA, MSIT
MCP, MCP+I, MCSE, MCT, CCNA, CCNP, CCAI
This collection of study guides, papers, movies, videos, presentations, tables,
calculators, posters, questions & answers, etc. are meant to be used by those preparing to
write the Cisco CCNA exam, as well as IT professionals looking to learn more about
networking concepts, and Cisco routing and switching.
There is no substitution for knowledge and understanding. Cisco has protected it's
certifications by requiring that you KNOW and UNDERSTAND
networking. Memorizing answers to questions will not give you the skills for you to get a
job or keep a job.
About sources
This is a collection from various text,
internet sites, and my own writings I have collected over the years. A lot of the material
in these Study Guides is a collection of the work of others. They are by no means all
mine. It is not my intention to duplicate for my gain the work of others without giving
them credit. The problem is I have not kept, nor could I possibly find, the true sources
for a lot of this information. I have put this series of web pages together only as a
consolidator of information. The only goal is to assist the reader in understanding
networking, routing, and switching better, and to possibly obtain a certification from
Cisco as a CCNA. This collection is not published for my (or any) profit or gain.
Thank you for your understanding.